1984: It looked like a simple job. Guarding a woman - nameless and almost faceless after a savage acid attack - at a Glasgow hospital. PC Alan McAlpine has no idea that this simple job will haunt his career and change his life forever. 2006: Two decades later, Alan steps into Partickhill police station and back in time. Now a celebrated Detective Chief Inspector, McAlpine has been drafted in to lead the hunt for a man the press are calling 'the Crucifixion Killer'. With his distinguished reputation, McAlpine's team are confident their new DCI will lead them to the killer. But the obsession that was born in a hospital room twenty-two years earlier has never quite left Alan. And now, it seems, it's come back for a reason...
